某研究表明，如果中子星的质量超过3.2倍太阳的质量，中子就无法_爱下问搜题

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问题单项选择题

某研究表明，如果中子星的质量超过3.2倍太阳的质量，中子就无法与自身引力相抗衡，从而发生中子塌陷。

下列观点能有力支持以上推断的是（）。

A．宇宙中存在质量比中子星大无数倍的黑洞

B．宇宙中存在着许多密度是中子星密度 3.2倍以上的神秘星体

C．自然界中没有任何物质能支撑3.2倍以上太阳质量的物质引起的引力塌陷

D．塌陷是大质量中子星使内部达到新的平衡的途径之一

答案

参考答案：C

解析：

本题属于加强型题目，题干的论述为充分条件的命题，而C是最能支持这个条件命题的论断的，而ABD是不能直接支持这个论断的，所以选择C。

完形填空

Different things usually stand for different feelings. Red, for example, is the color of fire, heat, blood and life. People say red is an exciting and active color. They associate（使发生联系） red with a strong feeling like 46 . Red is used for signs of 47 , such as STOP signs and fire engines. Orange is the bright, warm color of 48 in autumn. People say orange is a 49 color. They associate orange with happiness. Yellow is the color of __50__. People say it is a cheerful color. They associate yellow too, with happiness. Green is the cool color of grass in __51__. People say it is a refreshing color. In general, people __52__ two groups of colors: warm colors and cool colors. The warm colors are red, orange and __53__. Where there are warm color and a lot of light, people usually want to be __54__. Those who like to be with __55 _ like red. The cool colors are __56_ and blue. Where are these colors, people are usually worried. Some scientists say that time seems to __57 _ more slowly in a room with warm colors. They suggest that a warm color is a good __58_ for a living room or a __59_ . People who are having a rest or are eating do not want time to pass quickly. __60 colors are better for some offices if the people working there want time to pass quickly.

C．administration

D．frightening

解答题

打字员小李每分钟打字45个，小李1小时20分钟可以打字多少个字？